Aaron decided to lead the Stranded task walkout also to protect Jem. Apparently she was distressed at the fact the 'key' part of the task involved the combination number which revealed her true age. She didn't want this to be common knowledge so Aaron decided to spare her blushes. And voila Jem's big age reveal - the set piece of the task (shown on website) was mysteriously bannished from the HL show.
BB may have realised they risk ruining Jem's career - female wrestlers don't really have long left once they hit 30 and decided to just show Aaron walking out. C5 are having so many cover ups to 'manage' the truth. Come back channel 4 all's forgiven.